The big 10k is on Sunday and have not done too much running this week as I didn't want to aggravate my shin or ankle. I have however just been out for a gentle 4k run round the village and I strapped my heart rate monitor on to see what it could reveal.
It was slow 4k in 28 minutes (last Parkrun I did was 30:19) but It was intended to see how my shin & ankle were and to make sure I was primed for Sunday.
I uploaded my Garmin to Endmondo (which I have just upgraded to the Pro version £10 a year to get extra stats - I just love a graph or two). It gives me a breakdown of my heart rate zones
Warm Up Zone 46 s (3%)
Fat Burning 6m 34s (23%)
Aerobic 18m 56s (65%)
Anaerobic 2m 43s (9%)
This is interesting as I think I was aiming more for the fat burning zone and looking at my time is where I would have thought I was most of the time but obviously not. I need to double check my maximum heart rate and my resting heart rate to check they are correct.
Oh the science of running!!!